RT Journal Article SR Electronic T1 Headache JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1824 OP 1826 VO 28 IS 9 A1 Jordan, John E. A1 for the Expert Panel on Neurologic Imaging YR 2007 UL http://www.ajnr.org/content/28/9/1824.abstract AB